Ghnim Zahraa Sabah, Adhab Ayat Hussein, Reddy M Sudhakara, Sharma Girish Chandra, Saud Haider Radhi, Shit Debasish, Jaidka Sachin, Bhakuni Pushpa Negi, Mahdi Morug Salih, Mansoor Aseel Salah, Radi Usama Kadem, Abd Nasr Saadoun, Batuli Asgar
College of Pharmacy, Alnoor University, Nineveh, Iraq.
Department of Pharmacy, Al-Zahrawi University College, Karbala, Iraq.
Sci Rep. 2025 Apr 3;15(1):11471. doi: 10.1038/s41598-025-92382-1.
Enhancing the stability of polymer gels under harsh conditions is vital for improving enhanced oil recovery (EOR) applications. This study introduces a novel gel synthesized using a MgO-HPAM nanocomposite and zirconium sulfate crosslinker (CL). The gel demonstrates exceptional durability, capable of maintaining its properties under high temperature and salinity, addressing long-standing challenges in EOR. The research involved several key experiments. Initial tests revealed that MgO does not influence gelation time; this is controlled by polymer and CL concentrations. The nanocomposite significantly improved the storage modulus, with increases of 72.47% and 84.52% at 250 and 500 ppm MgO, respectively. Syneresis studies showed that after 50 days, gels with 250 ppm nanocomposite retained 88% of their weight, unlike the nanocomposite-free gels which lost 75%. In core flooding experiments, nanocomposite gels demonstrated higher injection pressure and reduced permeability compared to nano-free gels. SEM imaging confirmed nanoparticle agglomeration in the sand face, enhancing the gel's barrier properties. Over 50 days at 90 °C and 2000 psi, permeability reductions were observed at 58%, 98.1%, and 97.9% across the samples. These findings underscore the potential of this gel in advancing EOR techniques.
在恶劣条件下提高聚合物凝胶的稳定性对于改进强化采油（EOR）应用至关重要。本研究介绍了一种使用MgO-HPAM纳米复合材料和硫酸锆交联剂（CL）合成的新型凝胶。该凝胶具有出色的耐久性，能够在高温和高盐度下保持其性能，解决了EOR中长期存在的挑战。该研究涉及几个关键实验。初步测试表明，MgO不影响凝胶化时间；凝胶化时间由聚合物和CL的浓度控制。纳米复合材料显著提高了储能模量，在MgO浓度为250和500 ppm时，分别提高了72.47%和84.52%。脱水收缩研究表明，50天后，含有250 ppm纳米复合材料的凝胶保留了88%的重量，而不含纳米复合材料的凝胶则损失了75%。在岩心驱替实验中，与不含纳米材料的凝胶相比，纳米复合材料凝胶表现出更高的注入压力和更低的渗透率。扫描电子显微镜成像证实了砂面处的纳米颗粒团聚，增强了凝胶的阻隔性能。在90°C和2000 psi条件下超过50天，各样本的渗透率分别降低了58%、98.1%和97.9%。这些发现突出了这种凝胶在推进EOR技术方面的潜力。
